Miter box



March l2, 1929. A. KoPEcKY MITE'R BOX Filed Jan. 3, 1927 4 Sheets-Sheet l'.

March 12, 1929. KoPl-:cKY

MITER BOX Filed Jan 3. 1927 4 Sheets-Sheet 2 March 12, 1929. A. KoPEcKY MITER BOX 4 Sheets-Sheet www Filed Jan. 5, 1927 March 12, 1929. A. KoPEcKY MITER BOX Filed Ja115, 1927 4 Sheets-Sheet 4 'IIIIIIIIIIIL Patented Mar. 12, 1929 UNITED STATES ANTON KOPECKY, OF CHICAGO, ILLINOIS.

MITER BOX.

Application filed January 3, 1927. Serial No. 158,512.

rfhis invention relates to improvements in miter boxes, and has among its principal objects to provide a miter looX which shall be so constructed and arranged as to aflord a comparatively high degree of accuracy in the cutting of moldings and the like, and which shall be adjustable foi cutting the ends of such moldings and theI like at various predetermined angles.

Another object of the invention is to provide a miter boX having a pair of stages for supporting a pair of moldings and the like, whereby the ends of two of said moldings may be simultaneously cut at the desired angle without the necessity of cutting the end of one of such moldings and then resetting the mechanism of the miter box to cut the oppositely disposed angle of the end of the other molding, as is commonly provided in existing miter boxes.

A further object of the invention is to provide a miter box having a mechanism for simultaneously imparting movement to the stages thereof for oscillatably moving such stages in relatively opposite directions and with th"I same degree of angular movement.

A still further object of the invention is to provide such mechanism whereby one of said stages may be moved independently of the other to selectively vary their distance apart from each other without disturbing their relative angular position, whereby two moldings and the like of various widths may be inserted into the miter box for simultaneously cutting` the eti-operating ends of such moldings :it the desired angle. that is. one ol' sueh stages may be adjusted by independent inoveiiunt pai'allelly with the longitudinal renter line which passes throufili the pivotal centers of the stage, or in other words, one of said stages is independently movable or adjustable parallelly with the longitudinal center line of the saw.

Another object of the invention is to provide adjustable means for securely retaining the moldings and the like onto their supporting stages.

lVith the above and other objects in view, my invention consists in the novel combination, construction and arrangement of the parts andl members shown in a preferred embodiment in the accompanying drawings, described in the following specifications, and particularly pointed out in the appended claims.

Referring to the drawings, Figure 1 is a plan View of a miter boX embodying the preferred construction of my inventioif;

Figure 2 illustrates a longitudinal section taken on line 2-2 of Figure 1.

Figure 3 is a cross section taken on line v 3 of Figure 2;

. Figure 4 is` also a cross section taken on lined- 4 of Figure 2;

Figure 5 is a sectional plan view taken oncline 5 5 of Figure 2, showing the meehanisin for operating stages;

Figure 6 a cross section taken on line 6"-6 of Figure 2, showing substantially an end elevation of the miter box and the staees therefor; n

Figure 7 is a cross section taken on line '7 7 of Figure 5;

Figure 8 is a cross section taken on line 3 8 of Figure 2;

Figure f) is an enlarged detail in cross section taken on line 9-9 of Figure 6; and,

Figure 10 is a cross section taken on line 10-10 of Figure 9.

Referring now to the illusratii'ins.. 'i5 indicates t base plate upon which is mounted 11G a pair of bearing blocks 16 and 17 for slidably supporting the saw-carrying base ineinlier 1S. The base member 18 is formed with beveled sides whereby vertical or ei'osswise displacement is overcome but longitudinal movement thereof readily afforded. The saw 1S) and supports 20 may be of anv suitable design or construction and it will here sutliee to state that the supports Qt) coinprise retaining memlwrs 20A which permit a longitudinal movement of the saw therein and which are f-:lidably supported on the vertically disposei'l rods 20". The rods 20 :ire rigidly mounted on the base member 1S.

The base ineniher 18 is provided with a pair ot spaced plates 18A as a lower guide for the saw teeth, and which platesl are mounted on a level with the two stages 21 which support the molding or the like during the cutting oi'ieration. i

The stages 21 are provided with pivot arms 21"* formed preferably integrally with the lower fares thereof and having' comparatively thinner extensions 21B or pivotal support. As viewed in Figures 1 and 5, the left hand stage arin 2l is pivotally supported on the bearing Q2 and the right hand stage is pivotally supported on the traveling nut 23 which is screw-mounted on the threaded shaft 24.

The stages 21 comprise flat base plates 2l and a longitudinally extending partition 21D. The base 2l of the right-hand stage 2l additionally supported on a pedestal 2.3 fixed to the base thereof and slidably supported on the base l5.

The outer edge et the lett-hand stage base 21Il is supported on the quadrant 26 and guided by means of integrally cast guides 21E which engage the underside of the quadrant 26. A suitable indicator arrow 211i is fixed to the outer edge of the lett-hand stage 21 which is adapted to register with the indications 26 on the face of the quadrant to show the angular position of the stages 2l and their partition walls 2i". The quadrant 26 is rigi-'lly supported on the posts 2G upon the base l5.

To aiford the simultaneous setting of the two stages 21 at like angles, I provide the itol lowing mechanism A longitudinally disposed screw 27 mountcd in bearing 2S is pro vided which is threaded as at 27A and equipped with a hand-wheel 27p. An arm 29 having a pair of integral extensions 29A threaded on the screw portion 27A is positioned for movement in the guide 30. The other end 29B of the arm 29 is threaded to receive the threaded portion of the tube 3l and a link 32 is pivotally mounted upon the extension 29B at one end and at the other end has pivotal connection with the arm 2lA of' the left-hand stage 2l.

A sliding block 33 is rigidly fixed to the end of the tube 3l which tube 3l is mounted for reciprocation within the guide 34 which is fixed to the base 15. It will be observed that the end 29B of the arm 29 is also provided for slidable movement within said guide 3l. A link 35 is pivotally mounted to the block 33 at one end, the other end of which is also pi votally connected to the arm 2lA of the right-hand stage 2l.

Referring now to the traveii1'r l nut 22h it will be observed that same is mounted l or slidable movement or reeiprocation within the guide 36 which is also securelyv mounted to the base plate 15.

Referring now particularly to Figures 2, 3, 4 and 5, the shaft 2l is provided at its outer end with a suitable hand wheel 24A and at its inner end i Yith an integral extension 24 ot substantially rectangular cross sectioin the narrower Yfaces of which are curved to conform to the curvature of the inside ot the tube 3l. The tube 81 is designed to slide over the extension 24, however, by means of the provision ol two short plates S7 iii-- serted within the inner end ol the tube 231, and rotation of the shaft 2-l will impart rotation to the tube 31.

The rotation of the hand wheel 27B will impart rotary movement to the threaded portion 27A of the shaft 27, and will cause a sliding movement of the arm 29, whereby the tubular member 3l may be caused to move inwardly over the extension 24B toward the threaded portion of the shaft 2li. thus causing a simultaneous inward movement ot the two links 32 and to thereby canse an oscillating movement ot the arms 21; oi' the two stages. lt will now be clear, that both stages 2l will be moved through lthe same degree of movement and that the amount of such angular movement otthe two stages may be clearly ascertained by reference to the indicator 211" and its relative position to the indications on the quadrant 2G. Should a wide molding or the like neeess. ate the lateral movement ot the right haal .stage without disturbing the relative angular positions of the two stages, a sliding movement, of the right hand stage 2l may be accomplished by the rotation of the hand wheel 2l^ which will cause a rearward movenient ol' the traveling` nut on the threadrd portion of the shaft 2l simultaneous with the rotation of the threaded tubular member 3l through the threaded end 29 of the arm 29. and as the block 33 is rigidly fixed relatively to such tubular member 31, the block 33 will necessarily also move rearwarffly to move the right hand stage rearwaroly without disturbing the angular relation ot' the link and the arm 2lA ot' the liisht hand stage.

ln the illustrations the numerals 38 indicate moldings or the like positioned in place on the stages against the partition walls 21D and securely held in place on 'the stages by means of U-shaped retainers 40. lt will be observed that the retainers 40 are provided with a pair of longitudinal slots 40A within the horizontal leg thereof, to afford longitudinal adjustment on the stages, and that suitable bolts 4l with wing nuts are provided for fastening the retainers to the stage. The bolts -ll are adjustably mounted in the slot-1 2ls within the stages which slots are dis-- posed right angularly to the slots 4W' within the retaining members to afford cross-wise adjustment of. the retaining` members l'or moldings otl varying widths.

To provide additional retaining` members for comparatively high moldingsy clamping members `generally indicated by numeral l2 are provided on the partition walls 21D. Each of the clamps 42 comprises a threaded bolt 42, upon which is mounted the block 42N W'ithin the block 42^ and upon the bolt 42 is a securing nutot circular shape 42C. The bolts 42 are secured to the wall 21D by means o'll a screw 42D. The block 42 is provided with a passage 42 extending at right angles to the bolt 42B and adapted to carry the shank 42E, to the other end of which is rigidly mounted a bearing plate 42G. It will now be readily apparent that the bearing plate 42C' with its shank 12F is slidably mounted in the passage 42E to adord llt fid'ustment` of the beurine )late 4t2 to the l .s l

desired point on the tace ot the moldings which muy be held against the Wall 2l, and also that since the block 42A is loosely or pivotiilly supported on the bolt 42, such block may be disposed or adjusted in fr.' desirable position to present the bearing plate 42@ und its shank et tiny t esnnhlc angle. When the clump is adjusted, the same. can readily be irmly tightened by tile operation of the nut 42C.

From the above description and nttnelied illustrations, it is believed that :1n extended description ot the operation will not be necessary, ns the suine will be readily npparent to those skilled in the nrt. Ilowever, it may be stated that the sziW-sui'ipoi'ting dw vice :1nd its buse l8 muy be readily adjusted longitudinally relatively to the baise l5 by virtue of the slidzible mounting' ot the buse 18 within the bearings 16 :ind l?.

I claim:

1. In zi miter box. nnd in combination, :i suiv, zi smv-supporting device, o pair stages for supportin;l the wort( diirin operation of said saw, mechanism 'tor L ninitzineously moving` said stages in relai ively opposite directions and in like angular relation to said szivv, and iidditioinil means for movilngr one of said stages independently oi the other of said stages to selectively' vai y their distance apart trom each other Without disturbing their relative angular positions.

2. In al. miter box, und in combination, :i smv, ai saw-carrying de Yice, n pair of pivotally mounted stages tor snpporting*Y Work during; the operation of said smv, means for imparting movement to said stages for simultaneously oseillntfibly moving' said stages in relatively opposite directions, and separate nienns tor independently moving one ot sziid sttigies pzirullelly with the center line passing through the pivotal centers of said stages.

3. In :i miter box, and in combination, a sow, :i saw-curr)fing` device, a pair of pivotally mounted stages tor supporting the work during' the operation ot said szivv, mechanism tor imparting movement to said stages tor ;--imnltnneously oseilhitnbly moving' said stones in relatively opposite directions, and Additional mechanism for moving one ot said stages parallelly With the longitudinal center line of the sav' sind independently of the other of said stages to selectively vitry theiil distance apart from euch other without disturbing their relative :infguliir positions.

.fr miter box :is embodied in claim :ind including pivots for said stili;` :Suid pivots being' located in ditlierent points of a common plane.

5. A miter box embodied in claim 2l, and includingy pivots for said stages, said pivots beingr located in different points ot' :i common plaine.

6. In ii mitcr box, and in combination, a savv, ai suvv-czirrying device, zi parir ot pivotiilly mounted stages for supporting,r the vvorl; during! the operation ot' siii-d smv, mechanism for imparting movement to sind stages tor simultaneously oscillzitzlbly moving said stages in relatively opposite directions, additional mechanism for moving one of s io stages perallelly with the longitudinal center line passing through the pivotal centers oli said stages independently ot the other o' said stages to selectively very their distance :ipzirt from euch other Without disturhingg' their inzet-ive :inguhir positions, :and menos tor indicating the relative Angular 'positions of sziid stages.

ln witness Whereoia I attix my signature.

ANTON KOPECK Y. 

